Type-writing machine.



C. H. SHBPARD. TYPE WRITING MACHINE.

APPLIUATION FILED JUNE 27, 1911.

Patented July 23, i912.

3 SEEETS-'SHBBT 2.

INVENTDR |415 AT TURNEV weTNaE:

C. H. SHEPARD.

TYPE WRITING MACHINE.

APPLIGATION FILED JUNE 27, 1911.

1,033,481. Patented July 23,1912.

3 SHEETS-SHEET 3.

WITNEEEEE. INVENTUR.

fi? M f/W MQW 't I l l f? MMM/L,

HI'EATTDRNEV TED S;TATES-v jrATEN oFF-icm CHARLES H. SHEPARD, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO

UNION TYPEVEITEECOMPANY, OF JERSEY CTY, NEW JERSEY, A CORPORATIONA 0F NEVI JERSEY.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patent-ed July23, 1912.

Applicationed June 21,1911. Serial No. 6353537.

'['o Il :elif/m. it may mul-(fra I le it known that- I. Cnaizmts H. Si-iiaaiu),

eiti'/.en of the United Statese and resident of" provenient on that shown in niv p-rior Pat;-

entl 'No Slifll-(l, dated March' 29th, 1,910.

'lhe prineipal objeetA of the present invenlion is to render eertain parts of the escape ment more positive in their action so that. there is less liability of any' failure of the parts to aet and to art as quickly4 as is required in iiieehanisin of this oharaetei.

'lo the above and other ends which .will

appear hereinafter.'nirin'vention cousistsin.

rertain features of eonstruetion',and combinations and arrangements tif-parts, `all of which will be fully set. forth herein and partienlarly pointed out i'ii4 tht` Claims'.

My present invention is ca liable of Considerable modification.

()ne einlaaln'ient of said invent-itin is illus-` trated in the. atafonipanying drawings in wliieh t `igure 1 is a froii t.-torear vertical-see-A t.ional view of so inueh of aftypewi'jiting maelnne as is-ueeessary to illustrate the einbednnenl of my invention therein. Fig.

is a side elevation of the esrapeineiit mecha# nism in normal position and with parts` in .ser-tion. Fig. E. is a .similar view butwit-h the parts in the posit-ions they oeeupy when the ke)v is deeply depressed. Fig'. l is a Arear elevation of Fig. 3 and with theparts' Fig. tl is a fragmentary .sectional .v iew'of a detail. Figl is on arediioed scale, lf`igs'.

24a are :on an enlarged Scale and Fig. 9 is on'- a still larger scale.

My invention is applicable or readily adaptable to tyi'iewritiiig machines generally. l t is here shown applied to a ilonaich typewriter. The static-nary {raiiie work of this maehine comprises a bin-sc l, corner posts 2, to'p plate vstandards 4, earriagerails 5 supported b vsaid standards, and' a. bracket 'G depending' froniv the top plate. A platen Y is' mounted in a paper carriage S supported by the rails in the usual manner. Said earriage is fed toward 'the left by a strap 10 runn'ingover a spring` drum 11 supported by the liraeket-,t and the feed of said-carriage is' controlled b v means which include a feed raek 12 mounted on arms 13 wliieli'ai-e pivot'ally `nu'united in the carriage S, said rack engaging a feed pinion 14 rigid with a. shaft l5 ivhieh is jouinaled in a braeketl 1 6 seeured to the top plate 3. At its rear Aend the. .shaft` l5 has mounted thereon'the usual housinpr i7 that eontains pawl and ratchet.

connection. with the eseapeinent wheel 18 whith'eaeapeinent wheel is loosely mounted on the shaft. livoted at lll t'o the-bracket (i, is a dog ret-ker 20 whieh'has an upstanding arm 2l and a horizont-al arm 22, the latter eonneeted bv means of a lilik 23 with an ari-n Q4 'forming partfof the 'fratrie of the universal bar 2 5 which is pivot'ed 'in the hase 1 of the maehine. Said i'inirersal -ba'r lies beneath a series of 'printing key levers- 26 havingr printiirgr keys 2T on their forwardends and tulerun'iwl at. their rear-ends` on a `fuk-ruin plate 2S. '.lhe .key levers'oleierate :sub-leversl -tl whieh are eoniiex-ted 'by links 3l with type barsl! mounted on a segmentdopr roeke'r has been souiewhat modified, the parts thus far referred to are here shown as -of substantially the 'ordim'iry illonairh eonslruetioiii and as far asniy invention is i'eonrerned they may be otianv suitable eonstruction. Said dog rocker is `provided with the nsualreturning 'spi-in er I li 'and niotion under tht` impulse ofwsaid .spring is limited b r the arm i2-stiikiirLr againstthe lower edge of the brat-liet (i. 'lhe univer- -sal bar and the eseapement are' also operated .b v the usual .spare kei'. not shown.

As shown in Figs. 1 and S. the` eseapeinent lieel 1h' is normally engaged b v a stepping?Y dog 35 whieh is pivoted to the -dog roekervon a pivot screw 3G for a limited iuotion, transversely of the maehine. When in noi'- i'nal position, the .said dog' is pressed toward i2-lil.. Ext-opt that the vertical arm *l of the ilo A -upper end of the dog 40 to move aboutsa-id the right, or toward the left as viewed in Fig. S, by the tooth of the esoapement wheel against an arresting portion of the arm 21 of the dog rocker. Yifi-'hen a key is depressed and the said arm is drawn toward the front of the machine to the position shown in Fig. 3, .said stepping dog .is-'drawn toward the left to the position shown in Fig. 4, by a spring which is connected at one end to the stepping deg and at the other end to an arm projecting leftward from the dog rocker arm 21. The motion of the stepping deg under the impulse of the spring 37 is limited by means that will be described l'iereinafter.

The holding dog 0 is pivoted to the dog rocker on a pivot screw 41 that passes throuo'h a hole 42, Fig. 9, in said dog and is threaded in to a hole L13 in. the arm 21. The pivot screw 41 extends horizontally and transversely of the machine, allowing the pivot. toward the front or back of the machine relatively tothe dog rocker. T he rno.-.v

tion of thi." '.log toward the arm 21, is 'li1n ited by an adjustable stop screw 44 threaded through.the dog and adapted to'strike the rear face of said arm. The rearward motion of Said dog is limited by .means that will be understood from the description ofothei` parts of the escapement. As

Ashown in Fig. 6, the upper end of the dog '10 is formed with a notch having a wall 45 that faces toward the front ofthe machine and :1 wall '46 that faces toward the right. When the dog rocker arm 21 is moved toward the front of the machine by t-he depression of a key, 'the tooth ofthe escapement wheel .that was' held by the'stepping dog enters the notch t5-46. Motion of the escapei'oent wheel is then prevented by the-wall 46 of said notch and further'. forward motion of the upper end of the do 40, is prevented by the wall o of sai notch engaging the rear vsurface of the A'tooth of the esca'pementwheel. AAny further depression of the keytherefore causes the arm 21 to move forward independently of the dog 40. The dog 35, however, moves on with the dog rocker and the result lof' the further deprgssion of the key is therefore to widen the giip between thetwo-dogs' and 40'. shown in Fig-2 this gap is of le'sswidth than the thickness ofthe esc-apement' wheel' Y but upon a deep depression-of -aY key the' gap may acquire a widthgreater than the thickness of the cscapementwheel.

Means are provided' for causing the dog 40 to move out of the escapement wheel in the very -irst part of the upstroke of the key regardless'of the extent of the down stroke. Said means consists in means for taking up the lost motion betweenl the dog rocker and Q5 thedog- 4 0 .due to the arrest, of said dog t0 in the normal position. of the partsz face ofthe arm 21 and fill up the space be tween these two parts whether that space be comparatively much or comparatively little depending on the extent of operation imparted to the dog rocker.

-The mounting of the wedge 4 7 is best shown in Fig. 5 where it will be Seen that said wedge consists of a tapering curved arm` projecting from a lever 50 which .at 5l,

Figs. 2, 4 and 5, is pivoted to the rear face of the arm 21. the parts shown in Fig. 8,v the thin part of 'the wedge is in front of the dog 40; but

when said dog is held away from the -arm 2l hy` the depression of a key, the wedge is drawn farther in into engagement with the dog.. as shown in Fig. 4 by means of a spring 52 connected at one end to an arm 53 of the lever 5U and at t-he other end to a pin 54 projecting from the dog rocker. As in my prior patent above referred to, the eX- tent to which the wedge is -drawn in depends upon the extent of separation of. the

two dogs 35 and 40, which, in turn depends upon the extent of key depression or rather upon the extent-'to which the dog rocker is In the normal position ofA operated. Said dog 'rocker mayA be moved farther by one key than-by anotheriowing to some difference in the proportions ofthe parts, and it will .be operated further by a long depression of a key than it will by' a short, quick stroke. Whatever the degree of separation between the two dogs, said.'

degree of separation will be maintained by the wedge so that the rear dog 40 moves out of the wheel immediately in the vfirst part of. the upstroke of the key.

VVt'vhen the dog rocker has -moved back so' far toward normal position that the escapement wheel again engages the dog 35, saidV .dog is moved back by said wheel from the posit-ion shown in Fig. 4to' that s hown in Fig. 1 and this motionv of the stepping .dog

withdraws the wedgefrom in front of the 'dog 40. To this end the dog 35 has proljecting therefroman arm 'having'an offset part 56 lwhich engages an arm 57 pro' A jecting ,from theilever arm 50. The olf-set engaging said arm 57, for'ces'the,.wedge back to its normal position as will be understood. f-

' Means are provided whereby theL restora tion' of the wedge to normal position positively forces the dog t0 back to its normal forward position. Said means may beconstructed in a variety of forms. vAs here shown the lever 50 has an arm 60 projecting therefrom beneatharshonlderfGl, Fig.

G, of the dog 40, and said arin 6C' preferahly has an adiusting screw G2 threaded Vtlieretliroiiggh and seruretl iii its adjusted position by a look-nut, (S3 the upper end el' dog gli) awa)Y from normal position also positively foi'f'es the wedge into itsy engagithe .sorew (l2 diret'tltY engaging the sliottloer i l contemplatil adjustinif the connections;

from the dogr roel'et' to tht universal bar so that ordiiiarihv the spat-e oetween the do;A 40 and the dog` 3.3 will not exteed the width or thieltness ofthe est-apenient wheel. ease of any iiiaetftii'atwv ol.- adjustment. ever. aiid also in ease a hey is pushed down hard` this space may exe-eed the thit'ltness of the wheel. To insure the proper oper ation of the eseapenient; under these rondt tions I have provided a safety dog` ttl which is pivoted at 35 to the rear l'ate ol` the ariii 2l and between aid arm antil the wedge 4T, the aiin 2l being suitably tait outl for the purpose. rs shown in Fig. 2.

linlt (i6 is pivoted to ythe do;f til ai t'iT near the upper end ol' said dog. -Saiil linl;

whit-h. plays a pin Tt) projecting l'i'oni the side of tht` dog 3.3. The motion ot' the fratelli dogt ttl toward the left is liniitetl by a pin Tl projertiinglr from the arin 2l, said pin also serving as an abutinentor guide for the upper end of the dog 4t). 'The dog` t'i-l is pressed toward the lett by a spring T2 secured to the arin 2l h v a strew T'l. The slot ('38 is of suth length as to pei-init oll the ordinary \ibration of the dog" Il() without disturbing the dog` ttl. It is the end ot' this slot that limits the niotion of said dog 35 under the impulse ol' its sprintfy 3T so that when the eseap'ernent wheel is held by the dog 40. as shown in Fig. 4, the pin Tl) is in the end of the slot. It' now the space between the two dogs exceeds the thiekness of the esoapeinent wheel, then upon the upstroke of the key the tooth ot' said wheel will estape from the dogg,` `lt) and will strike the dog 64, moving said dog (il to the position shown. in Fig. T4 where the wheel will be teiiiporaril)v arrested. Said dog o4, :toting through the link t'it'i, pulls the dog' 35 tip to itsnorinal position as shown in Fig. T, and said dog 35 fort-es the wedge hack to its normal position and the lever 5t) of which said wedge forins a part, forces the dog 40- back to normal position. \\'hen the dog rot-ker Completes its stroke to norinal position, the tooth ol' the eseapeinent wheel escapes from the dogr 64 and the next succeeding tooth is caught by the dog 35, the dog (3l being restored to normal position by the spring 72. The positive connection between the dog 40 and the lever L() not only results in a posit-ive restoration of the dog 40 to normal position but the motion of said intl position`r at least to a reitaiii eXtent and to :i stillitieiit extent to ystart tht` wrtlfje on it engaging niotioii. lrel'eiahli'. when the wedge is in deep engagement with the dog Jf() as shown in lftff. l. there is a slight lt `t i iiiotion between the sri-ew 131: and the :liouh dei' Vil.

l piel'er to ptit a `slight tiiriioiial reY 1 straint on the dop; lil. 'this iatwiiiiplishwl hv meansl Ashown iii Figi', it wiiere it will l il! and lil. and iii said fut-outs is plat'ed :i

split washer T-l whith is spittnL iiito :i spiral torni so that it eoiiipi'wsed lo' thtI .st'rew 'll and presses the du;r into l'rit'tioiial ii Qageiueut with the broad llat head olI the *,(fl'tutt.

The toniiettioii between thtI sal'eti' do"r and .stepping dogg insiii'rs posiiiwl'r il at the stepping; doe' nets in the path ol the right t'ioth ol the wht-el. lii in) piioi' patent the `safety di@l was lixed and iii order to insuriis toi-ined at its other end with a slot Vw) in i proper eiiuageiiient ol' tht stepping dof*r this` sal'et'i' tlojf had to be ysetV so as to allow ont)- about a halll dro'vi to the wheel. liy pivotv innv the safety di in the prt-lent rase and raining` .said safety doL' when operated to pull the ,stepping do; r tip to its normal po i tion. l ain enabled to allow to the e-:'ape nient wheel nearliv its t'till stepping' motion before it is' arrested bj' the, safety dit; and :it the lsaine tiine to e that the stoppin .5 dit;r engages the rigitk tooth, The pofuitiie toiiiitactioiis between the wedge and tho hold ing dog 4t) lei'eatliv intiease the t'ertaiiil olI operation ol' the dei'ite.

t It, will be perceived that it is the power einploi'ed to more thtI t'arriati'e that restores the wedge and the dopv lt) to iiot'iiiztl posi4 tions.

Various changes van be made in the de tails of eoiistriirtion and irranneiut-nt withY out departing;v troni ini intention.

'hat' l t'laitii as new and desire to secure by Letters latent` iwf*- l. The toniliiinition with au esrapeiuent rack. of a stepping do@` and a holding' dog'. one movable toward and l'roin the other iii a. iliiet'tion traiisterse to `said i'at'k. and a safety dogr adapted to arrest said ratlt il' it esrapes troni both ol' the lirst mentioned dogs, .said safety dog beii'ig)r niorable and operativelyr tw'inneeted with the stepping` log. t ""f' 2l. The eo'inbination with ati est'apeineiit raek, a stepp'ngftlog and a holding dog. one inovable from and toward the other in a direction Ltnan'svers to said ra -k,a nio-:- ably; mounted safety dog adapted to arrest said rockt'if it escapes from both of the tirst mentioned dogs, and a lost inotion connection between said stepping dog and said safety dog adapted to allow to said stepping dog its ordinary stepping motion independently of the safety dog but to move said stepping dog to normal position when the safety dog is operated.

3. The combination with an escapement rack, of a dog rocker arranged to vibrate transversely of said rack, a stepping dog mounted on said dog rocker for vibration to and fro in the direct-ion of motion of said rack, a holding dog mounted on said dog rocker for motion relative to the dog rocker in a direction transverse to said rack, means for arresting said holding dog when it has moved a short distance into engagement with the rack, a Wedge for taking up the lost motion between the holding dog and the dog rocker due to further motion of Said dog rocker after the holding dog has been arrested, a positive operative connection between said wedge and said holding dog for restoring the holding dog to normal position, and means for restoring said wedge to normal position.

4. The combination with an escapement rack, of a holding dog. a dog rocker, means for arresting said holding dog during the forward stroke of the dog rocker, a wetre for taking` up the lost motion between the holding dog and the dog rocker, means for 'e-rtoring said wedge to normal position, and eeans whereby said wedge restores said holding dog to normal position.

5. The con'ibination with an esapement rack, of a stepping dog arranged to step hack when freed froln the rack to engage a new tooth and to be restored by the rack to normal position, a holding dog arranged to be arrested when it has moved a short distanee into engagement with the rack, a wedge for taking up the lost motion between the stepping dog and the holding dog, means whereby said stepping dog when moved to normal position withdraws said wedge, and means whereby said wedge restores said holding dog to normal position.

(3. The combination with an escapelnent raf-k. of a stepping dog, a holding dog arranged to he arrested when it is moved a short distance into engagement with the raek. means for taking up the lost motion due to the arrest of the holdingdog, and means operated by the stepping of the rack for positively restoring normal position.

7. The combination with an escapement rack, of a dog rocker having a normally engaged dog and a holding dog. said holding nog. arranged to be arrested during the forward stroke of said dog rocker. a wedge pivoted to said dog rocker for taking up the lost motion due to the arrestv of the holding dog, and a lever arm integral with said said holding dog tol wedge and having an adjustable connection with said holding dog. and means for restoring said wedge to normal position.

8. The combination with an escapemem rack. of a stepping dog having a stepping motion parallel with the plane of said rack and restored to normal position by the stepping of said rack, a hoiding dog arranged to be arrested when it has moved a short distance into engagement with said raek. and positive operating conneetions between said stepping dog and said holding dog.

9. The combination with an esealiiement rack, of a stepping dog normally engaged with said rack, a second. dog mounted to move into the path of said rack when said stepping dog is moved out of engagement. said second dog being mounted for limited movement wit-hand by said rack, and a loose connection between said dogs arranged to allow said stepping dog to move back into position to engage an on-eoming tooth of the rack wit-hout moving the second dog bui to draw said stepping dog to its normal position when the second dog is moved by the rack.

10. The combination with an escapement rack` of a dog rocker. a stepping dog movably mounted on said dog rocker and normally engaged. by said rack, a spring for moving said stepping dog when said dog out of the rack back into position to engage an ori-coming tooth of said rack, a second dog movably mounted on said dog rocker in position to engage the rack when the stepping dog is withdrawn. and a loose connection between said dogs for drawing said stepping dog back to its normal relation to the dog rocker when said seeond dog is moved on the dog rocker by said rack, said connection being loose to allow the stepping dog to make its stepping motion independently of the second dog.

l1. The combination with keys, a power driven carriage and an eseapement rack. oi a normally engaged dog. a holding dog. means for arresting the forward motion of said holding dog onthe down stroke of a key before. said normally engaged dog completes its forward stroke. means for causing said holding dog to begin its backward motion immediately on the beginning of the tip-stroke of a key, and means operated by the power employed to move the carriage for positively restoring said holdingr dog to normal position with relation to said stepping doe'.

12. The combination with keys` a power driven carriage'and an escapement rack. of means for controlling the step-by-step feed of said rack comprising a dog rocker operated by said keys, a dog normally out of en gagement with said rack but moved into engagement by the forward motion ot' said dog the county of New York,

rocker (lue to the down stroke of a key, of New York, in means for arresting said dog before the dog and State of New York this 26th day' of rocker completes its forward stroke, and' June, A. D. 1911. means operated by the power employed to CHARLES H. SHEPARD. move the carriage for restoring said dog to lVitnesses: its normal relation to said dog rocker. CHARLES E. SMITH, Signed at the borough of Manhattan, city M. F. HANNWEBER.

Gopies of this patent may be obtained for ve cents-each, by addressing the Commissioner of Eaten, Washington, D. C. 

